3/27/00
00 46.64 S LATITUDE
91 08.60 W LONGITUDE
General Location and Strategy: SN14 is located on the northern flank. In combination with SN11 (at the caldera rim), it may catch a diking event from the young circumferential fissures on this flank of the volcano or a radial dike. It is also important to measure possible doming of the summit region of the volcano.
Field Notes:
Days measured: 05 Jan 00 - 06 Jan 00(North Flank - N of SN11)
Monument SN14 is located on one of the middle cones of kipukas (the uppermost cone) in the middle of a chocolate flow field. 50m below the site lies a small, flat vegetated patch.
Antenna height: 0.784m + 0.108m = 0.792m
Antenna offset:
Power up: 1120h (local or GMT?), 04 Jan 00
Power down: 1600h (GMT), 06 Jan 00
2000 Results
Data from 2 GPS days were combined (1/5/00-1/6/00). Solution was made by fixing Base (SN01).The first reported uncertainty uses the sigma of the coordinate group as a scaling factor and may be too pessimistic. The second uses the sigma of the single difference observations as a scaling factor and is obviously a gross underestimate.
X = -127283.6364 ± 2.6, 0.4 mm
Y = -6377296.696 ± 11.1, 2.2 mm
Z = -85962.5904 ± 11.1, 0.4 mm
Ht. 1012.9143
Lat. -0 46 38.346674
Long. -91 08 36.265954
The top arrow points to SN14 as seen from the pass in the northern ridge formed by the circumferential fissures. Chadwick in the foreground for scale. Site is on a small cone just beyond lightly-vegetated kipuka in a sea of young lava.
Here is is up close (from the kipuka).